spring中的@Value读取配置文件的细节处理过程

@Configuration
public class ConfigWithNull {
    @Value("${name}")
    public static String NAME;
    @Value("${age}")
    public static Integer AGE;
}

@Configuration
public class ConfigByStaticSet {
    public static String NAME;
    public static Integer AGE;
    @Value("${name}")
    public void setNAME(String name) {
        NAME = name;
    }
    @Value("${age}")
    public void setAGE(Integer age) {
        AGE = age;
    }
}

@Configuration
public class ConfigByInitializingBean implements InitializingBean {
    public static String NAME;
    public static Integer AGE;
    @Value("${name}")
    private String name;
    @Value("${age}")
    private Integer age;
    @Override
    public void afterPropertiesSet() {
        NAME = name;
        AGE = age;
    }
}

@Configuration
public class ConfigByStaticSet {
    public static List<String> FRIENDS;
    public static Map<String, String> DETAILMAP;
    @Value("#{'${friends}'.split(',')}")
    public void setFriends(List<String> friends) {
        FRIENDS = friends;
    }
    @Value("#{${detailMap}}")
    public void setDETAILMAP(Map<String, String> detailMap) {
        DETAILMAP = detailMap;
    }
}

friends=tim,tom,jack,tina
detailMap={realName:"mofengjiang",city:"HeFei"}